Freeze-dryer Epsilon 2-10D LSCplus
8 Maintenance and service
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Version 07/2022, Rev. 3.0 of 20/07/2022
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Translation of the original operating manual
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8.1.4
Aeration valve, media drain valve
WARNING
Risk of poisoning/infection caused by contaminated condensate
(defrosting water)
The condensate may contain harmful substances originating from the
product.
Contact with the condensate may cause severe damage to health.
• Wear suitable protective clothes, gloves, and respiratory protection
when maintaining the drain system (especially when cleaning the
valves and when replacing the seals)!
Contaminants such as product residues may lead to an insufficient vacuum.
In this case, the aeration valve and the media drain valve must be cleaned.
• Switch the freeze-dryer off and disconnect the mains plug.
• Remove the valve core.
• Clean the valve core and the opening with a moist cloth.
• Clean the O-rings and inspect them for any damage. Damaged O-rings
must be replaced.
1
Valve opening
2
Valve core
3
O-rings
Fig. 74: Valve opening and valve core with O-rings, here: aeration valve (example)
• Grease the valve core with a thin layer of high-vacuum grease, if
necessary, and reinsert the valve core.
• Put the freeze-dryer into operation again.
If the vacuum is still insufficient, the freeze-dryer must be checked by
qualified specialist personnel (see chapter 7.3 - "Service contact").
